The anus is a part of the large intestine that opens to the outside of the body. It is the tube through your stool you empty your bowels.The cells of the anus

The lining of the anus is made of flat cells similar to skin squamous cells. Most anal cancers are squamous cell cancers.

About 9 in 10 (90%) of anal cancers are squamous cell cancers, sometimes called squamous cell cancers.Symptoms of anal cancer may be similar to other problems of the anus, for example batteries (piles) or anal fissures.

The most common symptom is bleeding from the anus (rectal bleeding). Other symptoms may include

* Small bumps around the anus, which could resemble batteries * Pain in the anal area or the sensation of a ball he * Discharge of mucus from the back pass * Difficulty controlling your bowels (faecal incontinence) * A large piece (or pieces) in the groin

The most common symptom is bleeding from the anus (rectal bleeding). Nearly half of all people diagnosed with anal cancer had rectal bleeding or blood in their stools. Other symptoms may include cancer

* Small bumps around the anus, which can be confused with piles (haemorrhoids) * Pain in the anal area - 1 in 3 (30%) had some pain in the area or a sensation of a ball he * Discharge of mucus from your return journey * Difficulty controlling your bowels (faecal incontinence) * A large piece (or pieces) in the groin